Locking mechanism for valves.



J1, 1L EUMNMUER. LOCKING MECHANISM FOR VALVES. A'PLIOATION l-ILED mm. v.. m14.

M :m WMMWWW Pa'tmml Aug'. 25, Wm

"tlNllllED PATENT FFlE.

I i i Jenn a. scnnninnn, or rninenntiinin, rnitnsirmienie.

nonnina iinonnnisiit rait VALVES.

specification of Letters Patent.

appncation mediteren 7, 191e. semi mi asaeee.

To all whom it may concern y Be it known that I, JOHN A. SoHNnIDnR, a citizen of the United States, and resident oi Philadelphia, county of lPhiladelphia,1 and State of Pennsylvania, have invented an Imprmfement in Locking Mechanism. for Valves, of which the following is a specification. 1 f

My invention has reference' to l locking mechanism for valves and .consists of cerf f tain improvements which are vfully set forth to the locking mechanism.'

Referring to the drawingst--Figure 1 represents a sectional elevation of a valve mechanism embodying my invention; Fig. 2 represents a plan of the same on a smaller scale: 3 represents a perspective of a portion of the valve cap showingthe locking slot; Fig. 4 represents a section on line :v--m of Fig. l.; Fig. 5 represents a section on line y/g/ of Fig. 4;' Fig. 6 represents perspective of the vlooked parte.

Similar runner-als of reference indicate 2 corresponding parts. Y 1 designates a valve casing having an inlet 2 and outlet 3 communicating with the inter-ier of the casing and interposed between which is the tapered valve plug 4; of cus# ternary construction, by means of which the iow of fluid or may' be rotated es desired.

10 designates a. cap member adapted t0 fit over the top ofthe casing' land provided with an opening 11 of sufficient size to admit the wrench member 9, but of less diameter vthan the diameter of the plugr i so that the casing overlaps the end of the plugitI and prevents its removal from the casing when the cap isin position. The cap 10 as here shown Y is removably connected to the casing 1 by a bayonet joint consisting of the slot 12 and pin 13, and when partially trn'ed' to nlake the bayonet joint eiiective as a' lock it is further held by a locking device comprising the socket 14 and spring pressed plunger 15, the latter being slidably mounted in the casing. 1 and normally outwardly pressed by the spring 1G. The plunger 15 is provided with a detent member 17 one portion of which isgbet'eled as sli-ownl zit l@ 'for coperation with the beveled portion 19 of a slide block 20. The easing l is' suitably chant bored to receive the` block Qt) which is moiinted for sliding movement while a 'spring pressedpin 2 is also gttided by the walls of the' easing' l and is under control of the spring 22. By reference to Fig. 5 it will be noted that the pin 2l is radially disposed with respect to the plunger 4 and so arranged as' to project through the' wall of the casingl vinto contact with the plunger l and also 'seat Within a socket 23 of the plunger 4 when the latter comes into aliement with the said pin- 24 designates a suitable lug carried by the pin 2i and adapted to be held in Contact with the tevens ne@ e5 efe-1e sus@ meer 20. The block 20 is' controlled by a spring 26 which holds it outwardly pressed in order to contact with the fiat end 27 of a ltey cylinder 28 which is? suitably slotted as shown at 29, to receive a key of predetermined shape.

30 designates an abutment member serving as a stop to limit the turning movement of the cylinder 28. When the keyY cylinder 28 is in the position shown in Fig. 1 the flat end 27 thereof engages the block 2) and holds it in its rear' position against the tension of the spring 26 and consequently the beveled surfaces 19 and25 respectively coact j with the parts of the plunger 15 and pin 2'1 to withdraw both simultaneously from their sockets so that not only is the plug 4 free to frotate, but the cap l0 may be turned and released: The cap 10' is provided with a suitable slot 31 to permit partiel rotation thereof with respect to the cylinder 28 so that. the bayonet joint connection may be readily made'.

In the operation of the device the key Patentednug. 25, 19'14.

tion to establish communication between the -inlet and outlets of the casing, the said pin 21 will rest against the surface of the plug ,4

without affecting its movement. Ifit is de.

sired to cut off the supply of Huid or gasthc plunger 4 is rotated 'by inserting and turning the wrench member 9 until the socket 23 comes into alinement with the pin 21. When this occurs the pin 21, being free to move under ythe action of the ,spring 22, seats within the socket 23 and thus holds the plug 4 against rotation. All parts of the device are now locked and may only be released by inserting the proper key in the cylinder 28 so that the position of the parts cannot be changed or ltampered .with by unauthorized parties.

In order to release the plug 4 so that it may be again turned to open position, the key is inserted in the cylinder 28 and the latter partially rotated to bring the end 27.

into engagement with the .block 20. This movement shifts the block 20 to the left as' shown in Fig. 1, and thereby, through the beveled portion 25 coacting with the block 24, retracts the pin 21 to unlock the plug 4. Simultaneously with this action the beveled portion 19 engages the similar face 18 to retract the plunger 15, thus temporarily unlocking the cap l0, though as soon as the cylinder 28 is swung back to its original position the plunger 15 will automatically return to its locking position while the pin 21 will merely rest against the face of the plug 4 as will be understood.

It will now be apparent that I have devised a complete unitary structure, simple and effective in operation, consisting of few parts but all of which cooperate to afford a positive locking means f r the valve parts and which in locked position can only be controlled by a particularl key. A device of this kindis particularly well adapted for use in connect-ion with motor vehicles where it may be employed asthe va'lve 4 controlling the supply of fiuid to the carbureter since by its use owners of a motor vehicle may leave their machine with a Vfeeling of security and the knowledge that no unauthorized persons can open the valve to supply the engine with fuel.V As a further safeguard to this end I have provided the cap member 10 which forms an auxiliary lock to prevent any one from releasing the plug 4 by removing the screw 6 so that the plug might be entirely removed and turned to open the valve.

Having thus described my invention, what said rrotatably mounted iii-*said casing' between said inlet and said outlet and having a socket opening therein, a spring pressed pin shdably mounted in said casing in alinement with thefpath of movement of said opening and adapted to seat in said opening in aline position, a cap for said casing 'removably secured thereto and overlapping the end of saidplug, said caphaving an opening therein, a spring pressed plunger slidably mounted in said casing in the path of movement of said cap opening and adapted to seat in said opening in alined position thereof, and means operable by a suitable key for retracting both said plunger and said pin whereby said plug and cap are released.

2. In a devicevof the character stated, a casing having an inlet and an outlet, a plug rotatably mounted in said casing between said inlet and said outlet and having a socket opening therein, a spring pressed p in sl1dably mounted in said casing in alinement with the path of movement of said opening and adapted to seat under the action of its spring in said opening in alined position thereof, a spring pressed block adjacent said pin, having a beveled portion adapted to cooperate with a portion of said pin, and means operable by a suitable key forshifting said block to retract said pin and release said lu p SigIn a device of the character stated, a easing having an inlet and an outlet, a plug rotatably mounted in said casing between said inlet and said outlet and having a socket opening therein, a cap removably secured to said casing and overlapping a portion of the end of said plug to preventremoval of said plug, means to lock said cap inv assembled condition, a spring pressed pin sl'idably mounted in said casing inyalinement with the p'ath of movement of said opening and adapted' to seat under the action of its spring in said opening in alined position thereof, a spring pressed block adJacent said pin and having a beveled portion adapted to Coperate with a portion of said pin, and means operable by a suitable key for shifting said block to retract said pin and release 4. n device of the character stated, a casing having an inlet and an outlet, a plug rotatably mounted in saidcasing betweenl said inlet and said outlet and having a socket opening therein, a cap removably secured to said casing and overlapping a portion of the end of said plug to prevent removal ofsaid plug, said cap having an opening therein, al

spring pressed plunger slidably mounted in said casing and adapted to project into the path of movement of said opening, a spring lll ideama' 'pressed pin slidably mounted in said casing in alinement With the path of movement oit said opening in alined position thereof, a block slidably mounted in said casing and provided with beveled surfaces-for respectively engaging portions or said plunger and said pin, and means operable by a suitable key tor shifting said block to retract said plunger and pin whereby said rotatable plug and cap are released for movement.

5. ln a Valve device, a body portion baving a thoroughfare for the passage ol* the fluid, and a rotary plug for controlling the passage of the fluid through the thoroughfare, combined With a cap detachably con nected with the body portion and arranged to prevent the plug from being Withdrawn, and a key operated mechanism shielded by the cap and provided with means for locking the cap against removal and the plugn against rotation.

t6. ln a. valve device, a body portion liavingl a tborouglifare for the passage of the Huid, and a rotary plug for controlling" the passage et the lluid through the thoroughi fare, combined with a cap rotatably adapted to the body portion and connected thereto by a bayonet joint and also provided with a portion which prevents the Withdrawal ot the plug, and key actuated means for loot? ing both the plug and the cap against rotan tion.

ln testimony of which invention, ll bere-- unto set my hand.

'JHN A. SCHNEIDER.

Witnesses:

ldM. HUNTER, HORACE D. Rnnvn. 

